Radiology reports use highly technical language specific to the practitioner's domain to convey findings and contain multiple sections, including Impressions, Findings, Conclusion, and Recommendation. They also often compare findings to a baseline–either a healthy individual or a previous study of the patient–and describe absence as well as presence of phenomena (e.g., "No visible pneumothorax"). This is in stark contrast to COCO captions, which use simple language to describe only the important details present in the scene, and avoid speculation or comparison [1]}. To address some of these differences, we use a vocab list specific to the scientific domain, scibert_scivocab_uncased [2]}, take text only from the Findings section of the report, and lengthen the maximum caption size that the model can accept to 170 tokens (95th percentile of finding section length).
